<template>
  <form id="data-form-container" ref="form" @submit.prevent="handleSubmit" class="data-form-container" >
    <div class="form-item">
        <div class="input-area">
            <input type="text" maxlength="10" v-model="formData.nickname" placeholder="用户昵称">
            <span class="tip">{{formData.nickname.length}}/10</span>
        </div>
        <div class="error">{{error.nickname}}</div>
    </div>
    <div class="form-item">
        <div class="text-area">
            <textarea placeholder="输入内容" maxlength="300" v-model="formData.content"></textarea>
            <span class="tip">{{formData.content.length}}/300</span>
        </div>
        <div class="error">{{error.content}}</div>
    </div>
    <div class="form-item">
        <div class="button-area">
            <button :disabled="isSubmiting">{{isSubmiting ? "提交中" : "提交"}}</button>
        </div>
    </div>
  </form>
</template>

<script>
export default {
    data(){
        return {
            formData:{
                nickname:"",
                content:""
            },
            error:{
                nickname:"",
                content:""
            },
            isSubmiting:false
        }
    },
    methods:{
        handleSubmit(){
            this.error.nickname = this.formData.nickname ? "" : "请填写昵称";
            this.error.content = this.formData.content ? "" : "请填写内容";
            if(this.error.nickname || this.error.content){
                return;
            }
            this.isSubmiting = true; //防止重复点击
            this.$emit("submit",this.formData,(successMess)=>{
                this.$showMessage({
                    content:successMess,
                    type:"success",
                    duration:1000,
                    container:this.$refs.form,
                    callback:()=>{
                        this.isSubmiting = false;
                        this.formData.nickname = "";
                        this.formData.content = "";
                 }
             })
            }); //让父组件处理时间
        }
    }
}
</script>

<style scoped lang="less">
@import url("~@/style/var.less");
.data-form-container {
  margin-bottom: 20px;
  overflow: hidden;
}
.form-item {
  margin-bottom: 8px;
}
.input-area {
  width: 50%;
  position: relative;
}
.text-area {
  position: relative;
}
.tip {
  position: absolute;
  right: 5px;
  bottom: 5px;
  color: #b4b8bc;
  font-size: 12px;
}
input,
textarea {
  display: block;
  width: 100%;
  box-sizing: border-box;
  border: 1px dashed @gray;
  outline: none;
  color: @words;
  font-size: 14px;
  border-radius: 4px;
  &:focus {
    border-color: @primary;
  }
}
input {
  padding: 0 15px;
  height: 40px;
}
textarea {
  resize: none;
  padding: 8px 15px;
  height: 120px;
}
.error {
  margin-top: 6px;
  color: @danger;
  font-size: 14px;
  height: 20px;
  line-height: 20px;
}
button {
  position: relative;
  cursor: pointer;
  border: none;
  outline: none;
  width: 100px;
  height: 34px;
  color: #fff;
  border-radius: 4px;
  background: @primary;
  &:hover {
    background: darken(@primary, 10%);
  }
  &:disabled {
    background: lighten(@primary, 20%);
    cursor: not-allowed;
  }
}
</style>